I am with a Samsung Galaxy Grand 2 Duos handset (G7102) which is locked with the default password, but I do not remember the password, email and password backup that has been set up on it. And you need the data that is stored in the internal memory, so you would have to unlock without having to format by the recovery mode. I have tried to unlock by passing a new ROM, file to change the binary code in .zip format through the recovery mode and that by the way were several files, trying to install the custom recovery mode as TWRP or CWM to install a custom ROM, and by Last tried in adb mode, none of these procedures worked out right.
I need to know if anyone here knows how to proceed in this case.
My contacts should you need:
WhatsApp: +55 67 98170-3007
If anyone can help me I appreciate it.